Turbomachine with means for the creation of a peripheral jet on the stator
a technology of stator and turbine, which is applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problems of limited aerodynamic roadability and the efficiency of turbomachines, such as the inapplicability of turbomachines, the inability to solve known problems, and the inability to achieve the effect of high efficiency and effective influence on the boundary layer
Inactive Publication Date: 2006-05-18
ROLLS ROYCE DEUT LTD & CO KG
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- Summary
- Abstract
- Description
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AI Technical Summary
Benefits of technology
[0007] A broad aspect of the present invention is to provide a turbomachine of the type specified above which, while avoiding the disadvantages of the state of the art, is characterized by exercising a highly effective influence on the boundary layer due to a controlled and well-positioned creation of a peripheral jet and by high efficiency.
Problems solved by technology
The aerodynamic roadability and the efficiency of turbomachines, for example, blowers, compressors, pumps and fans, is limited especially by the growth and the separation of boundary layers in the rotor tip area near the casing wall.
While various concepts for the fluid supply on turbine blades exist, these are not applicable to turbomachines since they primarily serve for surface cooling, not for boundary layer energization.
Accordingly, the general concept of influencing the boundary layer by blowing in or supplying fluid is provided in the state of the start, but the known solutions are trivial, only partly effective and very limited in their practical applicability.
These design features incur high cost and constructional effort.
The state of the art is disadvantageous in that realizable turbomachines involve considerable cost and constructional effort to ensure an adequately wide operating range, in particular, at partial load.
Simple existing concepts for blowing rotor tips are not compatible with a multi-stage design since they require additional space and do not satisfy the demands of operational safety.
Method used
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Embodiment Construction
[0036]FIG. 2a shows a highly simplified illustration of the inventive solution by way of a cutout of a multi-stage turbomachine. The core of the inventive solution is the device for the creation of a fluid jet which originates at the periphery of the main flow path and essentially parallels the casing, with this device being provided in the area of at least one stator 4 and constructionally integrated into the design of the stator (stator-integrated peripheral jet creation 11). This functional unit may, in a particular form according to the present invention, connect to, and be fed from, a point located further downstream in the main flow path (e.g. a chamber 13 for interstage bleed) via a flow passage (line 12). In a further particular form, a freely designable filter device 14 is provided in the route of the return line. In another particular form, a throttling device 15 or a controllable valve is provided in the route of the return line. This can be actuated by a mechanism of exi...
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A turbomachine has at least one stator (4) and at least one downstream rotor (7), with the stator (4) being provided with stationary stator blades and the rotor (7) comprising several rotor blades attached to a rotating shaft. A casing (2) confines the passage of fluid through the rotor (7) and the stator (4) in the outward direction. A mechanism for peripheral jet creation is provided in the area of at least one vane of the stator (4), with at least one nozzle (21) issuing fluid at the radially outer boundary of a main flow path.
Description
[0001] This application claims priority to German Patent Application DE 10 2004 030 597.8 filed Jun. 24, 2004, the entirety of which is incorporated by reference herein. BACKGROUND OF THE INVENTION [0002] The present invention relates to a turbomachine in accordance with the features described below. [0003] More particularly, this invention relates to a turbomachine with at least one stator and at least one downstream rotor, with the stator being provided with stationary stator blades and the rotor comprising several rotor blades attached to a rotating shaft. A casing exists which confines the passage of fluid through the rotor and the stator in the outward direction. [0004] The aerodynamic roadability and the efficiency of turbomachines, for example, blowers, compressors, pumps and fans, is limited especially by the growth and the separation of boundary layers in the rotor tip area near the casing wall. The state of the art only partly provides solutions to this problem. While vari...
Claims
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Login to View More IPC IPC(8): F04D27/02F04D29/68
CPCF04D27/0215F04D29/542F04D27/009F04D29/526Y10S415/914F04D29/684F04D27/0238F04D29/563F02C6/08
InventorGUMMER, VOLKER
OwnerROLLS ROYCE DEUT LTD & CO KG